420613679 has 2 divisors, whose sum is σ = 420613680. Its totient is φ = 420613678.

The previous prime is 420613657. The next prime is 420613681. The reversal of 420613679 is 976316024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420613679 - 2¹² = 420609583 is a prime.

Together with 420613681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420613619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210306839 + 210306840.

It is an arithmetic number, because the mean of its divisors is an integer number (210306840).

Almost surely, 2^420613679 is an apocalyptic number.

420613679 is a deficient number, since it is larger than the sum of its proper divisors (1).

420613679 is an equidigital number, since it uses as much as digits as its factorization.

420613679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 420613679 is about 20508.8683012983. The cubic root of 420613679 is about 749.2518043711.

The spelling of 420613679 in words is "four hundred twenty million, six hundred thirteen thousand, six hundred seventy-nine".